At a press conference in her home town of San Francisco, Pelosi explained that the program’s multiplier effect –the amount of money generated in the local economy as the result of the subsidy– far exceeds the nearly $60 billion spent this year by the federal government and is a sure-fire way to stimulate the economy. For every dollar a person receives in food stamps, Pelosi said that $1.79 is put back into the economy. The U.S. Department of Agriculture cites an even higher figure of $1.84.

Money from the program — officially known as the Supplemental Nutrition Assistance Program — percolates quickly through the economy. The U.S. Department of Agriculture calculates that for every $5 of food-stamp spending, there is $9.20 of total economic activity, as grocers and farmers pay their employees and suppliers, who in turn shop and pay their bills.

While other stimulus money has been slow to circulate, the food-stamp boost is almost immediate, with 80% of the benefits being redeemed within two weeks of receipt and 97% within a month, the USDA says.

Newt Gingrich, however, refers to this as “liberal math.”

GINGRICH: Well, you know, I carry around a bumper sticker that says 2 plus 2 equals 4. So I’d be very curious how a dollar given to somebody becomes a $1.79. And I think if we could get that to work with the U.S. Treasuries, so if people gave the Treasury $1,000, it became $1,790, we could pay off the federal debt and never worry about spending or anything. I mean, I — you know, somehow, I don’t understand how liberal math turns $1 into $1.79.